The article discusses an innovative system used for aerobic
biostabilisation and biological drying of solid municipal waste. A
mechanical–biological process (MBT) of municipal solid waste (MSW)
treatment were carried out and monitored in 5 bioreactors. A two-stage
biological treatment process has been used in the investigation. In the
first step an undersize fraction was subjected to the biological
stabilisation for a period of 14 days as a result of which there was a
decrease of loss on ignition, but not sufficient to fulfill the
requirements of MBT technology. In the second stage of a biological
treatment has been applied 7-days intensive bio-drying of MSW using
sustained high temperatures in bioreactor. The article presents the
results of the chemical composition analysis of the undersize fraction
and waste after biological drying, and also the results of temperature
changes, pH ratio, loss on ignition, moisture content, combustible and
volatile matter content, heat of combustion and calorific value of
wastes. The mass balance of the MBT of MSW with using the innovative
aeration system showed that only 14.5% of waste need to be landfilled,
61.5% could be used for thermal treatment, and nearly 19% being lost in
the process as CO2 and H2O.